50W Audio Tube Amplifier Power Supply toroidal Transformer 0-220V 0-12V 0-6.3V Power Supply Pure Copper Transformer - Amazon.com
Amazon.com: 62W EI Audio Power Supply high Voltage Transformer Dual 300V+13.6V+ 6.3V for Tube preamplifier Phono Amplifier SY2206-12784A1 : Industrial & Scientific
Amazon.com: 185W EI Power Transformer Output: 250V+6.3V+Double 3.15V Suitable for DIY Home Audio Tube Amplifier High Voltage Power Supply : Industrial & Scientific
1 Pair of 50W 320V+Dual 10V+6.3V Audio toroidal Transformer JADIS JP200 Tube preamplifier Power Supply - Amazon.com
Amazon.com: 100W Pure Copper EI Audio Power Transformer Dual 230V+12.6V+6.3V Suitable for M7 Tube Audio preamplifier : Industrial & Scientific
Amazon.com: 100W Audio EI Type Transformer Output 0V-230V-290V/0.2A+6.3V/4A Power Transformer for EL34 Class A Tube Amplifier (Size : 230V) : Industrial & Scientific
Amazon.com: 100W EI Power Transformer Input: 230V Output: 0V-115V-230V/200MA+6.3V/4000MA Class A Tube Amplifier Audio Transformer (Size : 115V) : Industrial & Scientific